Spa Marvel Cleanser is a fast-acting proprietary cleanser that penetrates deep inside of your spa’s plumbing and equipment, caustically removing bio-film, organic, mineral and chemical contaminants. In brand new spas, Spa Marvel Cleanser removes residues leftover from the manufacturing process including waxes, oils and resins.
Remove filters. You will not harm your tub by operating it with the filters out. Add one full bottle of Spa Marvel Cleanser into the existing water. Spa Marvel Cleanser performs much better in warmer water than in colder water. Run jets on high for at least 1 hour and then allow to circulate for an additional 23 hours. It is important that the Spa Marvel Cleanser circulate in the spa water. If the pumps are not on, the water is not circulating. If your spa does not run continuously, you may need to leave the Cleanser in for longer periods of time. i.e. if your spa circulates 12 hours a day, leave the Cleanser in for 2 days. 12 hours X 2 days = 24 hours of circulation. It is OK to leave the Spa Marvel Cleanser in the spa for longer than one day.
used it in a whirlpool bath that had black mold in fittings. needed some elbow grease to get inside of jets clean but otherwise seemed to clean up well. one bottle should last at least 4 cleanings.